How to iterate over a template-less variadic in C++

I was under the impression that I don't need a template in order to use variadics in C++. So in the following class, I have a method that accepts a variadic as its second variable. Now my question is: how do I iterate over the variadic?

class CoolClass{
    /** Other stuff go here */
    
    // my question is about this
    void variadic(X d, X others...){
        cout<<"Main is "<<d.value()<<endl;
        cout<<"Others are: "<<endl;
        for(const auto& o: { others... }){ // doesn't have to be const
            cout<<o.value()<<endl;
        }
    }
};

I tried running the code above and it doesn't work. I changed from { others...} to simply others`, but that doesn't work either.